Question: When was Pier Luigi Bersani first elected head of the government of Emilia-Romagna?
Paraphrase: In which year Pier Luigi Bersani headed the first profile for the government of Emilia-Romagna?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q1263 p:P6 ?s . ?s ps:P6 wd:Q47556 . ?s pq:P580 ?value}